Red List Category
for more information about the Red List categories and criteria
Justification of Red List category
This species only survives as a tiny population on four offshore islands. With the instigation of intensive management in 1995, numbers are now increasing, but the population trend over the last three generations has still been extremely rapid; it therefore qualifies as Critically Endangered.
BirdLife Species Champion:
110 mature individuals
Distribution size (breeding/resident):
Land-mass type - oceanic island - Oceanic islands are islands or island groups that are <200,000 sq km in size and separated from other land masses by >200 m sea depth. Generally Oceanic islands are islands or island groups that are <200,000 sq km in size and separated from other land masses by >200 m sea depth. Generally they have never been connected to a continental area by a land-ridge, and are volcanic in origin.
Realm - Oceanic - realm
IUCN Ecosystem -- Terrestrial biome